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corpus luteum |
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corpus luteumGlandular tissue formed in the mammalian ovary after ovulation from the Graafian follicle, a group of cells associated with bringing the egg to maturity. It secretes the hormone progesterone in anticipation of pregnancy. After the release of an egg the follicle enlarges under the action of luteinizing hormone, released from the pituitary. The corpus luteum secretes the hormone progesterone, which maintains the uterus wall ready for pregnancy. If pregnancy occurs, the corpus luteum continues to secrete progesterone until the fourth month; if pregnancy does not occur the corpus luteum breaks down. |
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With an increased baseline PdG reflecting more progesterone of adrenal origin in smokers, the decreased luteal-phase PdG levels we observed may indicate even lower corpus luteum contribution of progesterone to total excretion. If a corpus luteum is present, she has already ovulated and may be pregnant. It is comprised of recruitment, selection, and growth of ovarian follicles, ovulation, transformation of the ruptured follicular tissue into a functional corpus luteum, and finally the death of the corpus luteum and the subsequent menses. |
corpus luteum
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